Radio activities of the Department of commerce.  July 1, 1931.
Publisher: U.S. Govt. print. off.
Published: 1931
Place of publication: Washington
Language: eng
Number of pages: 34
Subjects: United States. Dept. of Commerce.; Radio.; Radio -- History.
Notes: At head of title:  U. S. Department of commerce.  R. F. Lamont, secretary.  Radio division.  W. D. Terrell, director.
"Important events in radio, 1827 to 1930":  p. 22-34.